<template>
  <a-layout-content
      :style="{ background: '#fff', padding: '24px', margin: 0, minHeight: '280px' }"
  >
    <p>
      <a-form layout="inline" :model="param">
        <a-form-item>
          <a-input v-model:value="param.name" placeholder="名称">
          </a-input>
        </a-form-item>
        <a-form-item>
          <a-button type="primary" @click="handleQuery({page: 1, size: pagination.pageSize})">
            查询
          </a-button>
        </a-form-item>
        <a-form-item>
          <a-button type="primary" @click="add()">
            新增
          </a-button>
        </a-form-item>
      </a-form>
    </p>
    <a-table
        :columns="columns"
        :row-key="record => record.id"
        :data-source="ebooks"
        :pagination="pagination"
        :loading="loading"
        @change="handleTableChange"
    >
      <template #cover="{text : cover}">
        <img v-if="cover" :src="cover" alt="avatar">
      </template>
      <template v-slot:category="{text, record}">
        <span>{{getCategoryName(record.category1Id)}} / {{getCategoryName(record.category2Id)}}</span>
      </template>
      <template v-slot:action="{ text, record }">
        <a-space size="small">
          <a-button type="primary" @click="edit(record)">
            编辑
          </a-button>
          <a-popconfirm
              title="删除后不可回复,确认删除?"
              ok-text="是"
              cancel-text="否"
              @confirm="handleDelete(record.id)"
          >
            <a-button type="danger">
              删除
            </a-button>
          </a-popconfirm>
        </a-space>
      </template>
    </a-table>
  </a-layout-content>

  <a-modal
      title="Title"
      v-model:visible="modalVisible"
      :confirm-loading="modalLoading"
      @ok="handleModalOk"
  >
    <a-form :model="ebook" :label-col="{ span: 6 }" :wrapper-col="{ span: 18 }">
      <a-form-item label="封面">
        <a-input v-model:value="ebook.cover" />
      </a-form-item>
      <a-form-item label="名称">
        <a-input v-model:value="ebook.name" />
      </a-form-item>
      <a-form-item label="分类">
        <a-cascader v-model:value="categoryIds"
                    :field-names="{label:'name',value:'id', children:'children'}"
                    :options="level1"
                    placeholder="选择分类" />
      </a-form-item>
      <a-form-item label="描述">
        <a-input v-model:value="ebook.desc" type="textarea" />
      </a-form-item>
    </a-form>

  </a-modal>
</template>
<script lang="ts">
import { defineComponent, onMounted, ref } from "vue";
import axios from "axios";
import { message } from 'ant-design-vue';
import {Tool} from "@/utils/tools";

export default defineComponent({
  name: 'AdminEbook',
  setup(){
    const param = ref();
    param.value = {};
    const ebooks = ref();
    const pagination = ref({
      current: 1,
      pageSize: 3,
      total: 0
    });
    const loading = ref(false);

    const columns = [
      {
        title: '封面',
        dataIndex: 'cover',
        slots: { customRender: 'cover' }
      },
      {
        title: '名称',
        dataIndex: 'name'
      },
      {
        title: '分类',
        slots: {customRender: 'category'}
      },
      {
        title: '文档数',
        dataIndex: 'docCount'
      },
      {
        title: '阅读数',
        dataIndex: 'viewCount'
      },
      {
        title: '点赞数',
        dataIndex: 'voteCount'
      },
      {
        title: 'Action',
        key: 'action',
        slots: { customRender: 'action' }
      }
    ];

    /**
     * 数据查询
     */
    const handleQuery = (params : any) => {
      loading.value = true;
      axios.get('/ebook/list', {
        params:{
          page: params.page,
          size: params.size,
          name: param.value.name
        }
      }).then((response) => {
        loading.value = false;
        const data = response.data;
        if(data.success){
          ebooks.value = data.content.list;

          // 重置分页按钮
          pagination.value.current = params.page;
          pagination.value.total   = data.content.total
        } else{
          message.error(data.message);
        }
      });
    }

    /**
     * 表格点击页码时出发
     */
    const handleTableChange = (pagination : any) =>{
      console.log("打印自带分页参数具体数据细节: " + pagination);
      handleQuery({
        page: pagination.current,
        size: pagination.pageSize
      });
    }

    // ---------- 表单 ----------
    /**
     * 数组 [ 100, 101 ] 对应，前端开发 / Vue
     */
    const  categoryIds = ref();
    const ebook = ref();
    const modalVisible = ref(false);
    const modalLoading = ref(false);
    const handleModalOk = () => {
      modalLoading.value = true;
      ebook.value.category1Id = categoryIds.value[0];
      ebook.value.category2Id = categoryIds.value[1];
      axios.post('/ebook/save', ebook.value).then((response) => {
        const data = response.data;
        if(data.success){
          modalVisible.value = false;
          modalLoading.value = false;

          ebook.value.category1Id = categoryIds.value[0];
          ebook.value.category2Id = categoryIds.value[1];

          handleQuery({
            page: pagination.value.current,
            size: pagination.value.pageSize
          });
        }
        else{
          message.error(data.message);
          modalLoading.value = false;
        }
      });
    };
    /**
     * 编辑
     */
    const edit = (record: any) => {
      modalVisible.value = true;
      ebook.value = Tool.copy(record);
      categoryIds.value = [ebook.value.category1Id, ebook.value.category2Id];
    };

    /**
     * 新增
     */
    const add = () => {
      modalVisible.value = true;
      ebook.value = {};
    }

    const handleDelete = (id : number) => {
        axios.delete("/ebook/delete/" + id).then((response) => {
           const data = response.data;
           if(data.success){
             // 重新加载列表
             handleQuery({
               page: pagination.value.current,
               size: pagination.value.pageSize
             });
           }
        });
    };

    const level1 = ref();
    let categorys : any;

    /**
     * 数据所有分类
     **/
    const handleQueryCategory = () => {
      loading.value = true;
      axios.get("/category/all").then((response) => {
        loading.value = false;
        const data = response.data;
        if (data.success) {
          categorys = data.content;

          console.log("原始数组：", categorys);

          level1.value = [];
          level1.value = Tool.array2Tree(categorys, 0);
          console.log("树形结构：", level1);
          // 加载完成后，再加载电子书 否则分类树加载很慢，则电子书渲染会报错
          handleQuery({
            page:1, size: pagination.value.pageSize
          });

        } else {
          message.error(data.message);
        }
      });
    };

    const getCategoryName = ( cid: number ) => {
      let result = '';
      categorys.forEach((item: any) => {
        if(item.id === cid){
          // return item.name 是不起作用的
          result = item.name;
        }
      });
      return result;
    };

    onMounted(() => {
      handleQueryCategory();
    });

    return {
      param,
      ebooks,
      pagination,
      columns,
      loading,
      handleTableChange,
      handleQuery,
      handleQueryCategory,
      getCategoryName,
      edit,
      add,

      modalVisible,
      modalLoading,
      handleModalOk,
      handleDelete,

      categoryIds,
      level1,
      ebook,
    }
  }
});
</script>

<style scoped>
img{
  width: 50px;
  height: 50px;
}
</style>